该程序库适合长鸣型蜂鸣器，利用定时节拍对蜂鸣时间计时，鸣响期间无需占用CPU，并具有多种鸣响模式，可以作为各种报警、人机交互程序的底层函数库使用。-Type of library for sounding the buzzer, the use of time on the buzzer beat the time time, ringing without taking up CPU, and has a variety of ringing mode, can be used as all kinds of alarm, the underlying human-computer interaction process using the library .